Asphalt Sealer Calculator
Find how many gallons and 5-gallon buckets of driveway sealer you need for one or two coats, with the cost.
Change the values and press Calculate to work out your own figures.
From length and width
Enter the length and width.
Show the working
- first coat = area ÷ coverage
- second coat = area ÷ second-coat coverage
From an area
Enter the area.
Show the working
- first coat = area ÷ coverage
How to use it
Enter the length and width. Enter the area.
Lengths can be decimals, fractions or tape entries such as 12' 6 1/2" (in feet or inches). Prices are optional.
Key facts
gallons = area ÷ coverage (+ area ÷ second-coat coverage)
Coverage
Porous or cracked asphalt takes more; check the product's label. Sealer is usually sold in 5-gallon buckets.
Questions
How much sealer for a 50 × 25 ft driveway?
About 20.83 gallons for two coats (12.5 + 8.33): 5 buckets.
Formulas
gallons = area ÷ coverage (+ area ÷ second-coat coverage)
Sources
Limitations
- Material densities are typical values (the midpoint of the commonly published range); real loads vary with moisture, grading and compaction, so check with your supplier or type in their density.
- Tank results are the geometric volume; real tanks have wall thickness and fittings.